Voltage Level Detector (CB22135E)

We found this circuit in an English documentation from the 80's. Transistors are general-purpose types.

Standard cell (CB21538E)
This circuit was found in an old Philips publication. The circuit supplies a voltage corresponding to 4.5 V...
Pulse generator (CB8917E)
This circuit was found in Radio Electronics from the 90s. It uses a transconductance operational...
500 MHz Oscillator (CB9393E)
This 500 MHz oscillator has an output power of 1 W when powered by a 20 V source. The circuit was...